Alert archive / Montana / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 13, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at Jul 25, 2011, 5:23 PM MDT for Flathead County, Sanders County, Montana. It was in force for 52 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jul 25, 2011, 5:23 PM MDT (23:23 UTC)
- Expired
- Jul 25, 2011, 6:15 PM MDT
- In force
- 52 min
- Issued by
- NWS Missoula, MT
- Area
- Storm-based polygon
Counties Flathead County, MT, Sanders County, MT
The radar
The Missoula radar (KMSX), 127 km from the middle of the area, began a volume at 23:25 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 25, 6:00 PM MDT | HAIL 1 | 5 W Marion, MT | 1 INCH HAIL MCGREGOR LAKE CAMPGROUND |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Spokane, WA (KOTX), launched 12:00Z, 11.4 hours before the alert went out and 121 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 3271 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 16 m²/s²
- 0-3 km storm-relative helicity
- 31 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
959
WUUS55 KMSO 252323
SVRMSO
MTC029-089-260015-
/O.NEW.KMSO.SV.W.0013.110725T2323Z-110726T0015Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MISSOULA MT
523 PM MDT MON JUL 25 2011
THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHERN SANDERS COUNTY IN NORTHWEST MONTANA...
WESTERN FLATHEAD COUNTY IN NORTHWEST MONTANA...
* UNTIL 615 PM MDT.
* AT 512 PM MDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
CAPABLE OF PRODUCING ONE INCH HAIL...AND DAMAGING WINDS IN
EXCESS OF 60 MPH. BRIEF BUT HEAVY RAIN IS ALSO LIKELY WITH THIS
STORM. THIS STORM WAS LOCATED 6 MILES SOUTH OF BEND...OR ABOUT 20
MILES NORTHEAST OF THOMPSON FALLS...AND WAS MOVING NORTHEAST AT 40
MPH.
* LOCATIONS IMPACTED INCLUDE...US HIGHWAY 2...BEND...KILA...AND
MARION.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS AND HAIL...ALONG WITH
FREQUENT LIGHTNING AND HEAVY RAIN. FOR YOUR PROTECTION...GO INDOORS
AND STAY AWAY FROM WINDOWS. IF YOU ARE CAUGHT OUTSIDE...MOVE TO A
WELL PROTECTED AREA.
&&
LAT...LON 4802 11500 4831 11470 4808 11437 4782 11487
4791 11516
TIME...MOT...LOC 2323Z 214DEG 33KT 4790 11498
$$3 follow-up statements
196
WWUS55 KMSO 252342
SVSMSO
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MISSOULA MT
542 PM MDT MON JUL 25 2011
MTC029-089-260015-
/O.CON.KMSO.SV.W.0013.000000T0000Z-110726T0015Z/
SANDERS MT-FLATHEAD MT-
542 PM MDT MON JUL 25 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM MDT
FOR WESTERN FLATHEAD AND CENTRAL SANDERS COUNTIES...
* AT 536 PM MDT...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING ONE INCH HAIL...AND DAMAGING
WINDS IN EXCESS OF 60 MPH AND BRIEF HEAVY RAIN. THIS STORM WAS
LOCATED 9 MILES NORTHEAST OF BEND...OR ABOUT 31 MILES SOUTHWEST
OF KALISPELL...AND WAS MOVING NORTHEAST AT 35 MPH.
LAT...LON 4802 11500 4831 11470 4808 11437 4782 11487
4791 11516
TIME...MOT...LOC 2342Z 228DEG 30KT 4803 11485
$$058
WWUS55 KMSO 252345
SVSMSO
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MISSOULA MT
545 PM MDT MON JUL 25 2011
MTC029-089-260015-
/O.CON.KMSO.SV.W.0013.000000T0000Z-110726T0015Z/
SANDERS MT-FLATHEAD MT-
545 PM MDT MON JUL 25 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM MDT
FOR WESTERN FLATHEAD AND NORTHERN SANDERS COUNTIES...
* AT 542 PM MDT...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING ONE INCH HAIL...AND DAMAGING
WINDS IN EXCESS OF 60 MPH IN ADDITION TO BRIEF HEAVY RAIN.
THIS STORM WAS LOCATED 12 MILES SOUTHWEST OF MARION...OR ABOUT
29 MILES SOUTHWEST OF KALISPELL...AND WAS MOVING NORTHEAST AT 30 MPH.
LAT...LON 4790 11489 4796 11505 4799 11501 4802 11500
4831 11470 4813 11444
TIME...MOT...LOC 2345Z 226DEG 28KT 4803 11486
$$137
WWUS55 KMSO 260006
SVSMSO
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MISSOULA MT
606 PM MDT MON JUL 25 2011
MTC029-089-260016-
/O.EXP.KMSO.SV.W.0013.000000T0000Z-110726T0015Z/
SANDERS MT-FLATHEAD MT-
606 PM MDT MON JUL 25 2011
...THE SEVERE THUNDERSTORM WARNING FOR WESTERN FLATHEAD AND NORTHERN
SANDERS COUNTIES EXPIRES AT 615 PM MDT...
LAT...LON 4790 11489 4796 11505 4799 11501 4802 11500
4831 11470 4813 11444
TIME...MOT...LOC 0006Z 217DEG 27KT 4818 11475
$$The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 25, 1:44 PM MDT | Special Weather Statement | MSO | Granite | 31 min |
| Jul 25, 5:02 PM MDT | Special Weather Statement | MSO | Sanders | 28 min |
| Jul 25, 5:38 PM MDT | Special Weather Statement | MSO | Lake | 52 min |
| Jul 25, 5:48 PM MDT | Severe Thunderstorm Warning | MSO | Flathead, Lake, Sanders | 42 min |
Nearby
Severe Thunderstorm Warnings in Montana, 2011Every severe thunderstorm warning in 2011
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.